E. Snethlage, 1914,
Boim, Pará, Brazil.
Often grouped with similarly plumaged species in the “grey antwren assemblage” (see M. axillaris). Geographical distribution and diagnosability of races requires re-examination; possibly more than one species involved#R. Recent description of taxon oreni as full species#R was based on relatively low levels of genetic, vocal and plumage difference, and also recommended race heteroptera for species rank; greater genetic distinctiveness of latter is mirrored by acoustic evidence, which suggests its song has rising notes (score at least 2) with a larger frequency range (at least 1). More detailed integrative review of all taxa needed. Three subspecies recognized.
Food and feeding
Status and conservation
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